Description of problem: Headless Service are not wired by Kuryr as it returns directly the Pod's IPs behind the Service and do not load-balance between them, consequently no KuryrLoadbalancer Custom Resource should not get created for it. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
s/not get created/get created
Verified on OCP4.6.0-0.nightly-2020-09-24-074159 over RHOS-16.1-RHEL-8-20200903.n.0. Headless service is created and fully operative without neither klb crd nor loadbalancer associated to it: With below definition: $ cat demo_svc.yaml apiVersion: v1 kind: Service metadata: name: demo labels: app: demo spec: selector: app: demo clusterIP: None ports: - port: 80 protocol: TCP targetPort: 8080 Below service is created: $ oc get all -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES pod/demo-66cdc7b66-gtmrf 1/1 Running 0 114m 10.128.116.11 ostest-dxmgg-worker-0-cffvp <none> <none> pod/demo-66cdc7b66-nnlds 1/1 Running 0 114m 10.128.117.32 ostest-dxmgg-worker-0-m6k55 <none> <none> pod/demo-66cdc7b66-zpnzt 1/1 Running 0 114m 10.128.116.91 ostest-dxmgg-worker-0-shl4z <none> <none> pod/demo-caller 1/1 Running 0 109m 10.128.117.118 ostest-dxmgg-worker-0-shl4z <none> <none> NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR service/demo ClusterIP None <none> 80/TCP 9m50s app=demo NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR deployment.apps/demo 3/3 3 3 114m demo kuryr/demo app=demo NAME DESIRED CURRENT READY AGE CONTAINERS IMAGES SELECTOR replicaset.apps/demo-66cdc7b66 3 3 3 114m demo kuryr/demo app=demo,pod-template-hash=66cdc7b66 So,when trying to reach pod/demo through the service, only the first one is reached (there is no loadbalancing): (shiftstack) [stack@undercloud-0 endpoint_test]$ oc rsh pod/demo-caller curl demo.test.svc.cluster.local:8080 demo-66cdc7b66-gtmrf: HELLO! I AM ALIVE!!! (shiftstack) [stack@undercloud-0 endpoint_test]$ oc rsh pod/demo-caller curl demo.test.svc.cluster.local:8080 demo-66cdc7b66-gtmrf: HELLO! I AM ALIVE!!! (shiftstack) [stack@undercloud-0 endpoint_test]$ oc rsh pod/demo-caller curl demo.test.svc.cluster.local:8080 demo-66cdc7b66-gtmrf: HELLO! I AM ALIVE!!! (shiftstack) [stack@undercloud-0 endpoint_test]$ oc rsh pod/demo-caller curl demo.test.svc.cluster.local:8080 demo-66cdc7b66-gtmrf: HELLO! I AM ALIVE!!! There is not klb and openstack loadbalancer associated: (shiftstack) [stack@undercloud-0 endpoint_test]$ oc get svc/demo NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE demo ClusterIP None <none> 80/TCP 11m (shiftstack) [stack@undercloud-0 endpoint_test]$ oc get klb No resources found in test namespace. $ openstack loadbalancer show test/demo Unable to locate test/demo in loadbalancers Furthermore, as expected,the DNS resolution for the headless service provides directly the 3 pods fulfilling the selector condition: $ oc rsh pod/demo-caller nslookup demo.test.svc.cluster.local Server: 172.30.0.10 Address: 172.30.0.10:53 Name: demo.test.svc.cluster.local Address: 10.128.116.11 Name: demo.test.svc.cluster.local Address: 10.128.116.91 Name: demo.test.svc.cluster.local Address: 10.128.117.32
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (OpenShift Container Platform 4.6 GA Images), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:4196